Updated: Sep 12, 2019
How to remove and install the HP 4250 4240 4350 Fuser Maintenance Kit Part number Q5421-69007 Q5421A
Maintenance Kit Contents
1 Fuser Assembly RM1-1082
1 Transfer Roller RM1-0699
1 Tray 1 Pickup Roller RL1-0019
2 RM1-0036 Pikup Roller
4 Feed / Separation Roller RM1-0037
1 RL1-0007 Separation Pad
The maintenance kit page reset count procedure is below.
Alternate Manufacturer part numbers: HP Q5421A, Q5421-67903, Q5421-69007
Print Yield 225,000 pages
Fits these models:
HP LaserJet 4240
HP LaserJet 4240n
HP LaserJet 4250
HP LaserJet 4250dtn
HP LaserJet 4250dtnsl
HP LaserJet 4250n
HP LaserJet 4250tn
HP LaserJet 4350
HP LaserJet 4350dtn
HP LaserJet 4350dtnsl
HP LaserJet 4350n
If the display panel on your HP LaserJet reads "perform printer maintenance", "perform user maintenance", or anything along those lines it means your printer needs a preventative maintenance kit.
Reset the maintenance count on an HP LaserJet 4200, 4300, 4250, 4350
1. Turn the printer off. 2. Turn the printer back on and, as the memory begins counting, press & hold down the checkmark button while the memory is counting. The memory starts counting at 000MB immediately after you turn the power on. If you press the checkmark buttong too soon - before the memory starts counting - this procedure won't work. 3. Continue to hold down the checkmark button until all three LEDs are illuminated. 4. Release the checkmark button. 5. Press the up arrow (Navigation) button until the message "New Maintenance Kit" appears on the control panel display. 6. Press the checkmark button once.
A message "New Maintenance Kit " will appear in the printer's control panel display and the printer will be reset. Once the maintenance count has been reset the "Perform Printer Maintenance" message won't appear again until the maintenance interval has been reached (200,000 pages on a LaserJet 4200, 4250, 4300, and 4350 series printers).
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